JP2002266043A - CONDUCTIVE HEAT-RESISTING Al-ALLOY WIRE, AND ITS MANUFACTURING METHOD - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a conductive heat-resisting Al-alloy wire in which heat- treatment time can be shortened as compared with that for the conventional conductive heat-resisting Al-alloy wire and manufacturing costs can be reduced and which has excellent heat resistance, electric conductivity and strength, and also to provide its manufacturing method. SOLUTION: The wire can be manufactured by preparing a wire rod composed of Al alloy having a composition consisting of, by weight, 0.10-0.5% Zr, 0.05-0.50% Sc and the balance Al with inevitable impurities, heat-treating the wire rod at 100 to <300 deg.C for 1 to 100 hr and subjecting it to cold working at >=50% reduction of area.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat-resistant Al alloy wire for electric conduction and a method for manufacturing the same, and more particularly to a heat-resistant Al alloy wire used for overhead transmission lines and a method for manufacturing the same.

[0002]

2. Description of the Related Art In recent years, an overhead transmission line has been required to have an increased power transmission capacity with an increase in power demand. The easiest way to increase the transmission capacity is to increase the conductor cross-sectional area of the overhead transmission line, but this increases the weight and causes a problem that the allowable strength of the existing steel tower is exceeded.

Therefore, in order to increase the power transmission capacity without changing the conductor cross-sectional area, A having high heat resistance and high conductivity is used.
An alloy wire is used for the conductor. As an Al alloy satisfying these requirements, an Al—Zr alloy containing about 0.1 wt% of Zr has been used. This Al-Zr
In a system alloy, when the content of Zr is increased in order to improve heat resistance, on the contrary, the conductivity is lowered.
For this reason, the Al—Zr-based alloy contains Fe, M
g, Si, etc., and then heat treatment (aging treatment) for an extremely long time, thereby obtaining a heat-resistant Al alloy wire having excellent heat resistance and conductivity.

However, an Al-Zr alloy to which a third element such as Fe, Mg, or Si is added has a long time (for example, about 1
(200 to 200 hours), which is inferior in productivity and raises the production cost. Therefore, A
By adding a small amount of Be as a third element to the l-Zr-based alloy, a heat-resistant Al alloy (Al-Zr-Be-based alloy) wire for electric conduction has been developed in which the heat treatment (aging treatment) time is shortened. The situation is applied to transmission lines.

[0005]

However, Al-
The Zr—Be-based alloy can shorten the time required for the heat treatment, but has a problem that the raw material cost is increased because Be is an expensive metal.

Further, in the conventional alloy composition and manufacturing method of a conductive heat-resistant Al alloy wire, a heat-resistant Al alloy wire having a heat resistance, conductivity, and strength greatly exceeding those of the conventional conductive heat-resistant Al alloy wire is obtained. Can not expect.

Accordingly, the present invention solves the above-mentioned problems, and has a shorter heat treatment time, a lower manufacturing cost, and a lower heat resistance, conductivity, and strength than conventional heat-resistant Al alloy wires. It is an object of the present invention to provide a heat-resistant Al alloy wire for electric conductivity excellent in resistance and a method for producing the same.

[0008]

In order to solve the above-mentioned problems, the invention according to claim 1 is to provide a Zr with 0.10 to 0.50 wt.
%, Sc in an amount of 0.05 to 0.50 wt%, and the balance A
and a wire made of Al alloy which is an unavoidable impurity, and then formed on the wire at 100 ° C. or more and less than 300 ° C. × 1-1.
The heat treatment is performed for 00 hours, and then the wire is subjected to cold working with a cross-sectional area reduction rate of 50% or more.

According to a second aspect of the present invention, Zr is set to 0.10 to 0.1.
Containing 50 wt% and 0.05 to 0.50 wt% of Sc,
After forming a wire composed of Al and an Al alloy that is an unavoidable impurity, the remainder is 50 ° C. or more and less than 300 ° C.
Primary heat treatment for 1 to 30 hours, 300 to 500 ° C x 10
The wire is subjected to a secondary heat treatment for 60 hours, and then the wire is subjected to cold working with a cross-sectional area reduction rate of 50% or more.

According to a third aspect of the present invention, Zr is set to 0.10 to 0.1.
Containing 50 wt% and 0.05 to 0.50 wt% of Sc,
After forming a wire composed of Al and an Al alloy that is an unavoidable impurity, the wire is subjected to a heat treatment of 100 ° C. or more and less than 300 ° C. for 1 to 100 hours, and then the wire has a cross-sectional area reduction rate of 50% or more. After cold working, the cold-worked material is subjected to a heat treatment at 300 to 500 ° C. for 1 to 100 hours.

According to a fourth aspect of the present invention, Zr is set to 0.10 to 0.1.
Containing 50 wt% and 0.05 to 0.50 wt% of Sc,
After forming a wire composed of Al and an Al alloy that is an unavoidable impurity, the remainder is 50 ° C. or more and less than 300 ° C.
Primary heat treatment for 1 to 30 hours, 300 to 500 ° C x 10
A 60-hour secondary heat treatment is performed, and then the wire is subjected to cold working with a cross-sectional area reduction rate of 50% or more, and then the cold-worked material is subjected to a heat treatment at 300 to 500 ° C. × 1 to 100 hours. It becomes.

According to a fifth aspect of the present invention, there is provided the method according to any one of the first to fourth aspects, wherein the Al alloy further contains at least one metal component of Si, Fe, Ti, B, and Be. It is a heat-resistant Al alloy wire for conduction as described above.

[0013] The invention according to claim 6 is characterized in that the Si, Fe, T
i, B, and Be have a content of Si: 0.05-0.
10 wt%, Fe: 0.05 to 0.30 wt%, Ti:
0.01 to 0.10 wt%, B: 0.003 to 0.02
The heat-resistant Al alloy wire for electric conduction according to claim 5, wherein the content is 0.005 to 0.05% by weight.

According to the above configuration, the conventional heat resistance A for conduction is used.
A heat-resistant heat-resistant Al alloy wire having excellent heat resistance, conductivity, and strength as compared with a 1 alloy wire can be obtained.

According to a seventh aspect of the present invention, Zr is set to 0.10 to 0.1.
Containing 50 wt% and 0.05 to 0.50 wt% of Sc,
After a wire is formed using Al alloy melt whose remaining part is Al and unavoidable impurities, the wire is heated to 100 ° C. or more and 300 ° C.
The heat treatment is performed for less than 1 to 100 hours, and thereafter, the wire is subjected to cold working with a cross-sectional area reduction rate of 50% or more.

According to the invention of claim 8, Zr is set to 0.10 to 0.1.
Containing 50 wt% and 0.05 to 0.50 wt% of Sc,
After the wire is formed using Al and the Al alloy melt which is an unavoidable impurity, the primary heat treatment is performed on the wire at 50 ° C. or more and less than 300 ° C. for 1 to 30 hours, and 300 to 500 ° C. × 1
The secondary heat treatment is performed for 0 to 60 hours, and then the wire is subjected to cold working with a cross-sectional area reduction rate of 50% or more.

According to a ninth aspect of the present invention, Zr is set to 0.10 to 0.
Containing 50 wt% and 0.05 to 0.50 wt% of Sc,
After a wire is formed using Al alloy melt whose remaining part is Al and unavoidable impurities, the wire is heated to 100 ° C. or more and 300 ° C.
Heat treatment of less than 1 to 100 hours, and then subjecting the wire to cold working with a cross-sectional area reduction rate of 50% or more, and then subjecting the cold-worked material to heat treatment at 300 to 500 ° C for 1 to 100 hours. It is something to give.

According to a tenth aspect of the present invention, Zr is set to 0.10 to 0.10.
After forming a wire using 0.50 wt% and 0.05 to 0.50 wt% of Sc and the balance being Al and a molten Al alloy which is an unavoidable impurity, the wire is formed at a temperature of 50 ° C. or more and 300 ° C or more.
Primary heat treatment of less than 1 ° C for 1 to 30 hours, 300 to 500 ° C
A secondary heat treatment of × 10 to 60 hours is performed, and then the wire is subjected to cold working with a cross-sectional area reduction rate of 50% or more, and then a heat treatment of the cold-worked material is performed at 300 to 500 ° C. for 1 to 100 hours. Is applied.

The invention according to claim 11 is the invention according to any one of claims 7 to 10, wherein the molten aluminum alloy further contains at least one metal component of Si, Fe, Ti, B, and Be. 3. A method for producing a heat-resistant Al alloy wire rod for electrical conductivity according to item 1.

The invention according to claim 12 is characterized in that the Si, Fe, T
i, B, and Be have a content of Si: 0.05-0.
10 wt%, Fe: 0.05 to 0.30 wt%, Ti:
0.01 to 0.10 wt%, B: 0.003 to 0.02
The method for producing a heat-resistant Al alloy wire for electric conduction according to claim 11, wherein the content is 0.005 to 0.05% by weight.

According to the above method, the conventional heat resistance A for conduction is used.
Compared with the method of manufacturing a 1 alloy wire, the heat treatment time is short and the manufacturing cost of the wire is low.

The reason for limiting the above numerical range will be described below.

A Zr content of 0.10 to 0.50 wt%,
The reason why the Sc content is set to 0.05 to 0.50 wt% is that Z
r content is less than 0.10 wt% or Sc content is 0.0
If the amount is less than 5 wt%, the conductivity can be improved as compared with the conventional manufacturing method, but the heat resistance cannot be improved and the strength cannot be further improved. Further, the Zr content is more than 0.50 wt% or the Sc content is 0.5 w
If the amount is more than t%, the heat resistance can be improved as compared with the conventional manufacturing method, but the conductivity cannot be improved.

By containing Si in the range of 0.05 to 0.10 wt%, Al ₃ Zr, A
This has the effect of promoting the precipitation of l ₃ Sc and Al ₃ (Zr, Sc).

By containing Fe in the range of 0.05 to 0.30 wt%, there is an effect of improving the strength of the obtained wire.

Ti and B are each in the range of 0.01-0.
By containing 10 wt% in the range of 0.003 to 0.02 wt%, the crystal grains of the cast material are refined, and the occurrence of cracks and scratches in the cast material is suppressed. The yield is greatly improved.

When performing a heat treatment at 100 ° C. or more and less than 300 ° C. × 1 to 100 hours, if the heat treatment temperature is less than 100 ° C., nucleation of precipitates hardly occurs, and if it is higher than 300 ° C., the precipitates grow coarsely. Therefore, it is not preferable. On the other hand, if the heat treatment time is less than 1 hour, nucleation of precipitates becomes insufficient and
If the time is longer than 00 hours, the precipitate grows coarsely, which is not preferable.

When performing a first heat treatment of 50 ° C. or more and less than 300 ° C. for 1 to 30 hours, if the temperature of the first heat treatment is less than 50 ° C., nucleation of precipitates is difficult to occur. Is unfavorably grown coarsely. If the primary heat treatment time is less than 1 hour, nucleation of precipitates becomes insufficient, and if it is longer than 30 hours, the growth of precipitates occurs, which is not preferable.

When performing a second heat treatment at 300 to 500 ° C. for 10 to 60 hours, if the temperature of the second heat treatment is lower than 300 ° C., the growth of precipitates becomes insufficient and the conductivity does not recover.
If the temperature is higher than 0 ° C., the precipitate grows coarsely and the heat resistance decreases, which is not preferable. If the secondary heat treatment time is less than 10 hours, the growth of the precipitate is not sufficient, and if it is longer than 60 hours, the precipitate grows coarsely and the heat resistance is lowered, which is not preferable.

This is because in the case of cold working in which the cross-sectional area reduction rate is less than 50%, improvement in the strength characteristics (tensile strength) of the Al alloy wire rod due to work hardening during cold working cannot be expected.

After cold working, 300-500 ° C. × 1-10
When performing a heat treatment (recrystallization heat treatment) for 0 hour, if the recrystallization heat treatment temperature is lower than 300 ° C., nucleation of recrystallized grains is difficult to occur, and if it is higher than 500 ° C., the recrystallized grains grow undesirably. . Further, if the recrystallization heat treatment time is less than 1 hour, nucleation of recrystallized grains becomes insufficient, and if it is more than 100 hours, the recrystallized grains grow undesirably coarsely.

[0032]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a preferred embodiment of the present invention will be described.

The heat-resistant conductive aluminum alloy wire of the present invention is made of Z
r: 0.10 to 0.50 wt%, Sc: 0.05 to
0.50 wt%, Si: 0.05 to 0.10 wt%,
Fe: 0.05 to 0.30 wt%, Ti: 0.01 to
0.10 wt%, B: 0.003 to 0.02 wt%, B
e: A wire containing at least one metal component of 0.005 to 0.05 wt%, the balance being formed of Al and an Al alloy which is an unavoidable impurity, is formed into a wire, and then 10% is added to the wire.
The heat treatment is performed at 0 ° C. or more and less than 300 ° C. × 1 to 100 hours, and then the wire is subjected to cold working with a cross-sectional area reduction rate of 50% or more.

Next, a method of manufacturing the heat-resistant conductive aluminum alloy wire of the present invention will be described.

First, Zr: 0.10 to 0.50 wt%,
Preferably 0.15 to 0.40 wt%, particularly preferably 0.18 to 0.37 wt%, Sc: 0.05 to 0.5.
0 wt%, preferably 0.05 to 0.30 wt%, particularly preferably 0.05 to 0.20 wt%, and Si: 0.0
5 to 0.10 wt% and Fe: 0.05 to 0.30 wt%
%, Preferably 0.10 to 0.20 wt%, and Ti:
0.01-0.10 wt%, preferably 0.05-0.
10 wt%, B: 0.003 to 0.02 wt%, preferably 0.003 to 0.01 wt%, and Be: 0.00
5 to 0.05 wt%, preferably 0.005 to 0.02
An Al alloy containing 5 wt% and the remainder having a chemical composition of Al and unavoidable impurities is melted.

Next, the Properci method, Hezley method, SCR
A wire is formed using this Al alloy melt by a known casting method such as the Zr and Sr in the Al matrix.
An Al alloy wire in which c forms a solid solution is formed.

After that, the Al alloy wire is heated to 100 ° C. or more and less than 300 ° C. for 1 to 100 hours, preferably 150 to 100 hours.
280 ° C. × 30 to 80 hours, particularly preferably 200 to 2 hours
A heat treatment is performed at 50 ° C. × 40 to 60 hours. By this heat treatment, Zr and Sc dissolved in the Al matrix during casting are generated as fine precipitates (Al ₃ Zr, Al ₃ Sc, and Al ₃ (Zr, Sc)).

Next, the Al alloy wire rod after the heat treatment is subjected to cold working with a cross-sectional area reduction rate of 50% or more, preferably a cross-sectional area reduction rate of 75% or more, particularly preferably a cross-sectional area reduction rate of 90% or more. To obtain a heat-resistant Al alloy wire rod. The precipitates generated and grown during the heat treatment stabilize the work structure during the cold working. This makes it possible to significantly improve the heat resistance and tensile strength of the Al alloy wire rod after cold working without lowering the conductivity.

A conventional heat-resistant Al alloy wire for conductivity is one in which only Zr is dissolved in an Al matrix and Al ₃ Zr is precipitated by heat treatment to improve heat resistance without lowering conductivity. Met.

On the other hand, the heat-resistant conductive aluminum alloy wire of the present invention has a solid solution of Zr and Sc in an Al matrix and has a heat treatment of Al ₃ Zr, Al ₃ Sc,
And Al ₃ (Zr, Sc).
That is, the wire of the present invention is completely different from the conventional wire in the mechanism of improving heat resistance, conductivity or strength. Therefore, compared to conventional wires, conductivity, heat resistance,
A conductive heat-resistant Al alloy wire having excellent strength and strength can be obtained.

In addition, according to the method for producing a heat-resistant conductive Al alloy wire of the present invention, the conventional Al-Zr alloy and A
An Al alloy wire excellent in heat resistance, conductivity, and tensile strength can be obtained in a short heat treatment time as compared with an l-Zr-Be-based alloy. Here, since the heat treatment time is shortened, the productivity of the conductive heat-resistant Al alloy wire is improved, and the manufacturing cost can be reduced.

By performing cold working with a cross-sectional area reduction rate of 50% or more after the heat treatment, precipitates (Al ₃ Zr, Al ₃ Sc, and Al ₃ (Zr, S
c)) stabilizes the processed structure and makes it possible to significantly improve the heat resistance and tensile strength of the Al alloy wire rod after cold working without lowering the conductivity.

Next, another embodiment of the present invention will be described.

The heat-resistant conductive Al alloy wire of the first embodiment has a Zr content of 0.10 to 0.50 wt% and a Sc content of 0.1%.
0.5 to 0.50 wt%, Si: 0.05 to 0.10 w
t%, Fe: 0.05 to 0.30 wt%, Ti: 0.0
1 to 0.10 wt%, B: 0.003 to 0.02 wt
%, Be: from 0.005 to 0.05 wt%, after forming a wire comprising at least one metal component and the balance being Al and an Al alloy which is an unavoidable impurity, the wire is heated to 50 ° C. or more and 300 ° C. or more. A primary heat treatment of less than 1 ° C. × 1 to 30 hours, a second heat treatment of 300 to 500 ° C. × 10 to 60 hours, and then a cold working of a cross-sectional area reduction rate of 50% or more on the wire. is there.

A method of manufacturing the heat-resistant conductive aluminum alloy wire of the first embodiment will be described.

First, an Al alloy wire is formed by the same method as the manufacturing method of the present invention described above.

Thereafter, the Al alloy wire is applied to the wire at 50 ° C. or more and less than 300 ° C. for 1 to 30 hours, preferably 100 to 25 hours.
0 ° C. × 1 to 15 hours, particularly preferably 150 to 200 ° C.
Perform primary heat treatment for 5 to 10 hours. Next, 300-5
00 ° C x 10 to 60 hours, preferably 350 to 450 ° C
× 30 to 50 hours, particularly preferably 400 to 430 ° C
A second heat treatment is performed for 35 to 45 hours. By the first heat treatment and the second heat treatment, Zr and Sc dissolved in the Al matrix during casting become fine precipitates (Al ₃ Zr, Al
₃ Sc and Al ₃ (Zr, Sc)). The primary heat treatment nucleates precipitates,
The precipitate grows to a desired size by the subsequent heat treatment.

Next, the Al alloy wire after the heat treatment is subjected to cold working with a cross-sectional area reduction rate of 50% or more, preferably a cross-sectional area reduction rate of 75% or more, and particularly preferably a cross-sectional area reduction rate of 90% or more. To obtain a heat-resistant Al alloy wire rod.

The conductive heat-resistant Al alloy wire of the present embodiment and the method of manufacturing the same have the same effects as the conductive heat-resistant Al alloy wire of the present invention and the method of manufacturing the same.

Further, according to the method for manufacturing a heat-resistant Al alloy wire for conductive use of the present embodiment, the heat treatment applied to the Al alloy wire is divided into two stages (primary heat treatment and secondary heat treatment). The heat treatment time can be further shortened as compared with the method for producing a heat-resistant Al alloy wire rod for use.

Next, the heat-resistant conductive Al of the second embodiment is used.
A method for manufacturing an alloy wire will be described.

The heat-resistant conductive Al alloy wire of the second embodiment has a Zr content of 0.10 to 0.50 wt% and a Sc content of 0.1%.
0.5 to 0.50 wt%, Si: 0.05 to 0.10 w
t%, Fe: 0.05 to 0.30 wt%, Ti: 0.0
1 to 0.10 wt%, B: 0.003 to 0.02 wt
%, Be: a wire rod containing at least one metal component of 0.005 to 0.05 wt%, the balance being made of Al and an Al alloy which is an unavoidable impurity. C. × 1 to 100 hours, and then the wire is subjected to cold working with a cross-sectional area reduction rate of 50% or more.
The heat treatment is performed at 00 ° C. × 1 to 100 hours.

A method of manufacturing the heat-resistant conductive aluminum alloy wire of the present embodiment will be described.

The heat-resistant conductive aluminum alloy wire obtained by the above-described manufacturing method of the present invention is added to the wire at 300 to 500 ° C. × 1 to 100
The recrystallization heat treatment (heat treatment) is performed for a period of time, preferably 320 to 450 ° C. × 1 to 25 hours, particularly preferably 350 to 400 ° C. × 1 to 10 hours.
An alloy wire is obtained. By this recrystallization heat treatment, nucleation and growth of recrystallized grains occur, and most of the lattice defects introduced during cold working are eliminated.

According to the heat-resistant conductive aluminum alloy wire of the present embodiment, compared to the heat-resistant conductive aluminum alloy wire of the present invention,
The heat resistance can be further improved without substantially lowering the tensile strength and the electrical conductivity.

Next, the heat-resistant Al for conduction according to the third embodiment is described.
A method for manufacturing an alloy wire will be described.

The heat-resistant conductive aluminum alloy wire of the third embodiment has a Zr content of 0.10 to 0.50 wt% and a Sc content of 0.1%.
0.5 to 0.50 wt%, Si: 0.05 to 0.10 w
t%, Fe: 0.05 to 0.30 wt%, Ti: 0.0
1 to 0.10 wt%, B: 0.003 to 0.02 wt
%, Be: from 0.005 to 0.05 wt%, after forming a wire comprising at least one metal component and the balance being Al and an Al alloy which is an unavoidable impurity, the wire is heated to 50 ° C. or more and 300 ° C. or more. The first heat treatment of less than 1 ° C x 1 to 30 hours, the second heat treatment of 300 to 500 ° C x 10 to 60 hours, and then the wire is subjected to cold working with a cross-sectional area reduction rate of 50% or more. Later, 300 to 50
It is obtained by performing a heat treatment at 0 ° C. × 1 to 100 hours.

A method of manufacturing the heat-resistant conductive aluminum alloy wire of the present embodiment will be described.

In the same manner as in the second embodiment, the heat-resistant conductive Al alloy wire obtained by the manufacturing method of the first embodiment is applied at 300 to 500 ° C. for 1 to 100 hours, preferably 320 to 500 hours. 450 ° C. × 1 to 25 hours, particularly preferably 3
A recrystallization heat treatment (heat treatment) at 50 to 400 ° C. × 1 to 10 hours is performed to obtain a heat-resistant Al alloy wire for electric conduction according to the present embodiment.

According to the heat-resistant Al alloy wire for electric conduction of the present embodiment, the heat-resistant Al alloy wire of the first embodiment is hardly reduced in the tensile strength and the electric conductivity, compared with the heat-resistant Al alloy wire of the first embodiment. Can be further improved.

[0061]

EXAMPLES (Example 1) First, Zr: 0.35 wt%,
Sc: 0.20 wt%, Si: 0.08 wt%, Fe:
0.13 wt%, Ti: 0.07 wt%, B: 0.00
An Al alloy having a chemical composition of 5 wt% and the balance of Al and inevitable impurities is melted.

Thereafter, an Al alloy ingot is formed using the molten Al alloy, and then the Al alloy ingot is subjected to swage processing to form a rough drawn Al alloy wire having an outer diameter of 12 mm.

Next, this Al alloy rough wire was applied at 250 ° C. × 5
The aluminum alloy wire after the heat treatment is subjected to cold working with a reduction in cross-sectional area of 93%, and the outer diameter is 3.2.
A heat-resistant Al alloy wire rod having a thickness of 2 mm is produced. (Embodiment 2) A heat treatment at 295 ° C. × 50 hours is applied to the Al alloy rough drawn wire formed in the same manner as in Embodiment 1, and thereafter,
The heat-treated Al alloy wire is subjected to cold working with a cross-sectional area reduction rate of 93% to produce a heat-resistant conductive aluminum alloy wire having an outer diameter of 3.2 mm. (Embodiment 3) A primary heat treatment at 200 ° C. for 7 hours was applied to the Al alloy rough wire formed in the same manner as in Embodiment 1,
A second heat treatment is performed at 0 ° C. × 40 hours, and thereafter, the Al alloy wire after the heat treatment is subjected to cold working with a cross-sectional area reduction rate of 93% to produce a heat-resistant conductive aluminum alloy wire having an outer diameter of 3.2 mm. (Example 4) Zr: 0.20 wt%, Sc: 0.20 w
t%, Si: 0.08 wt%, Fe: 0.13 wt%,
Except for using an Al alloy having a chemical composition of Ti: 0.07 wt%, B: 0.005 wt%, and the balance being Al and unavoidable impurities, the outer diameter is 3.2 m in the same manner as in Example 3.
m is prepared. (Example 5) Zr: 0.35 wt%, Sc: 0.20 w
t%, Si: 0.08 wt%, Fe: 0.13 wt%,
Ti: 0.07 wt%, B: 0.005 wt%, Be:
A conductive heat-resistant Al alloy wire having an outer diameter of 3.2 mm is produced in the same manner as in Example 1 except that an Al alloy having a chemical composition of 0.01 wt% and the balance of Al and inevitable impurities is used. (Example 6) A heat-resistant conductive aluminum alloy wire having an outer diameter of 3.2 mm is manufactured in the same manner as in Example 5, except that the heat treatment is performed at 295 ° C for 50 hours. (Example 7) Primary heat treatment at 200 ° C for 7 hours,
A heat-resistant conductive aluminum alloy wire having an outer diameter of 3.2 mm is manufactured in the same manner as in Example 5, except that the secondary heat treatment is performed at 420 ° C for 40 hours. (Example 8) Zr: 0.20 wt%, Sc: 0.20 w
t%, Si: 0.08 wt%, Fe: 0.13 wt%,
Ti: 0.07 wt%, B: 0.005 wt%, Be:
A conductive heat-resistant Al alloy wire having an outer diameter of 3.2 mm is manufactured in the same manner as in Example 7, except that an Al alloy having a chemical composition of 0.01 wt% and the balance of Al and inevitable impurities is used. (Example 9) A primary heat treatment at 200 ° C for 7 hours was applied to the Al alloy rough drawn wire formed in the same manner as in Example 1,
A secondary heat treatment of 0 ° C. × 40 hours is performed, and then the Al alloy wire after the heat treatment is subjected to cold working with a cross-sectional area reduction rate of 93% to form an outer diameter of 3.2 mm. A recrystallization heat treatment is performed to produce a heat-resistant Al alloy wire for electric conduction. (Comparative Example 1) A heat-resistant conductive aluminum alloy wire having an outer diameter of 3.2 mm is manufactured in the same manner as in Example 1 except that the Al alloy does not contain Sc. Comparative Example 2 A heat-resistant conductive aluminum alloy wire having an outer diameter of 3.2 mm is manufactured in the same manner as in Example 2 except that the Al alloy does not contain Sc. Comparative Example 3 A heat-resistant conductive aluminum alloy wire having an outer diameter of 3.2 mm is manufactured in the same manner as in Example 3 except that the Al alloy does not contain Sc. Comparative Example 4 A heat-resistant conductive aluminum alloy wire having an outer diameter of 3.2 mm is manufactured in the same manner as in Example 4 except that the Al alloy does not contain Sc. Comparative Example 5 A conductive heat-resistant Al alloy wire having an outer diameter of 3.2 mm is manufactured in the same manner as in Example 5 except that the Al alloy does not contain Sc. (Comparative Example 6) A heat-resistant conductive aluminum alloy wire having an outer diameter of 3.2 mm is manufactured in the same manner as in Example 6 except that the Al alloy does not contain Sc. Comparative Example 7 A conductive heat-resistant Al alloy wire having an outer diameter of 3.2 mm is manufactured in the same manner as in Example 7 except that the Al alloy does not contain Sc. Comparative Example 8 A conductive heat-resistant Al alloy wire having an outer diameter of 3.2 mm is manufactured in the same manner as in Example 8 except that the Al alloy does not contain Sc. (Comparative Example 9) A heat-resistant conductive Al alloy wire having an outer diameter of 3.2 mm is manufactured in the same manner as in Example 9 except that the Al alloy does not contain Sc.

Table 1 shows the chemical composition and heat treatment conditions of the heat-resistant conductive Al alloy wires of Examples 1 to 9 and Comparative Examples 1 to 9.

[0065]

[Table 1]

Next, the tensile strength (MPa), conductivity (% IACS), and heat resistance (%) of the obtained heat-resistant Al alloy wires for conductivity of Examples 1 to 9 and Comparative Examples 1 to 9 were measured, respectively. did. Table 2 shows the measurement results.

Here, the heat resistance (%) is (tensile strength after heating the obtained heat-resistant aluminum alloy wire for electric conduction at 280 ° C. for 1 hour / tensile strength of obtained heat-resistant aluminum alloy wire for electric conduction) × It is a value obtained by 100.

[0068]

[Table 2]

As shown in Table 2, in the heat-resistant conductive aluminum alloy wires of Examples 1 to 9 according to the present invention, the tensile strength of 240 MPa or more and the 58%
It had a conductivity of IACS or higher and a heat resistance of 95% or more, and was excellent in strength, conductivity and heat resistance.
In a conventional aluminum alloy for power transmission lines, there is no material having the above-mentioned properties, and the present inventors have conducted intensive research and found out. In addition, when comparing the wire rods of Examples 1 to 4 containing Be with the wire rods of Examples 5 to 8 not containing Be, there is no significant difference in strength, conductivity, and heat resistance. It is apparent that it is not necessary to use natural Be as an Al alloy raw material.

On the other hand, the heat-resistant conductive aluminum alloy wires of Comparative Examples 1 to 9 were subjected to the same heat treatment as the conductive heat-resistant Al alloy wires of Examples 1 to 9, respectively.
Sc is not contained in the alloy. Therefore, Comparative Examples 1 to
In all of the wires of No. 9, all of the tensile strength, the electrical conductivity, and the heat resistance were inferior to the wires of Examples 1 to 9.

As described above, the embodiments of the present invention are not limited to the above-described embodiments, and it is needless to say that various other embodiments are conceivable.

[0072]

In summary, according to the present invention, a heat-resistant Al alloy wire having excellent conductivity, heat resistance and strength can be obtained in a short heat treatment time as compared with a conventional wire. It has the effect.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H01B 13/00 501 H01B 13/00 501D // C22F 1/00 C22F 1/00 A 603 603 604 604 625 625 625 630 630A 650 650A 661 661A 681 681 682 682 686 385 685Z 686 686A 691 691B 691C 694 694A (72) Inventor Masayoshi Aoyama 5-1-1, Hidakacho, Hitachi City, Ibaraki Pref. Inventor Toyomitsu Kumada 4-1-1 Kawajiri-cho, Hitachi-shi, Ibaraki F-term in the Toyoura Plant of Hitachi Cable, Ltd. F-term (reference) 5G301 AA03 AA04 AA09 AA19 AA21 AA24 AA30 AB01 AB08 AD01 AE10

Claims (12)

[Claims] 1. A wire containing 0.10 to 0.50 wt% of Zr and 0.05 to 0.50 wt% of Sc, and a balance consisting of Al and an Al alloy which is an unavoidable impurity is formed. A heat treatment of 100 ° C. or more and less than 300 ° C. × 1 to 100 hours is performed, and then, the wire has a cross-sectional area reduction rate of 50%.
A heat-resistant aluminum alloy wire for electric conduction, characterized by being subjected to the above cold working. 2. A wire containing 0.10 to 0.50% by weight of Zr and 0.05 to 0.50% by weight of Sc, and the balance consisting of Al and an Al alloy which is an unavoidable impurity is formed. First heat treatment of 50 ° C. or more and less than 300 ° C. for 1 to 30 hours, second heat treatment of 300 to 500 ° C. for 10 to 60 hours, and then cold working of the wire with a cross-sectional area reduction rate of 50% or more. Heat resistance A for electric conduction characterized by comprising
1 Alloy wire. 3. A wire containing 0.10 to 0.50% by weight of Zr and 0.05 to 0.50% by weight of Sc and the balance of Al and an Al alloy which is an unavoidable impurity is formed. A heat treatment of 100 ° C. or more and less than 300 ° C. × 1 to 100 hours is performed, and then, the wire has a cross-sectional area reduction rate of 50%.
The above cold working is performed, and then the cold worked material is
A heat-resistant conductive aluminum alloy wire rod, which is obtained by performing a heat treatment at 0 to 500 ° C. × 1 to 100 hours. 4. A wire containing 0.10 to 0.50% by weight of Zr and 0.05 to 0.50% by weight of Sc and the balance of Al and an Al alloy which is an unavoidable impurity is formed. First heat treatment of 50 ° C. or more and less than 300 ° C. for 1 to 30 hours, second heat treatment of 300 to 500 ° C. for 10 to 60 hours, and then cold working of the wire with a cross-sectional area reduction rate of 50% or more. After that, 300 ~
A heat-resistant Al alloy wire for electric conduction, which is obtained by performing a heat treatment at 500C for 1 to 100 hours. 5. The method according to claim 1, wherein the Al alloy further comprises Si, Fe,
The heat-resistant Al alloy wire according to any one of claims 1 to 4, further comprising at least one metal component selected from the group consisting of Ti, B, and Be. 6. The content of Si, Fe, Ti, B and Be is as follows: Si: 0.05 to 0.10 wt%, Fe:
0.05 to 0.30 wt%, Ti: 0.01 to 0.10
wt%, B: 0.003 to 0.02 wt%, Be: 0.
The heat-resistant Al alloy wire for electric conduction according to claim 5, wherein the amount is 005 to 0.05 wt%. 7. A wire rod is formed by using 0.10 to 0.50 wt% of Zr and 0.05 to 0.50 wt% of Sc, the balance being Al and a molten Al alloy which is an unavoidable impurity. 100 ° C or higher and lower than 300 ° C x 1 to 100
A method for producing a heat-resistant Al alloy wire for electric conduction, comprising: performing a heat treatment for a long time; and thereafter subjecting the wire to cold working with a cross-sectional area reduction rate of 50% or more. 8. A wire is formed by using 0.10 to 0.50% by weight of Zr and 0.05 to 0.50% by weight of Sc, the balance being Al and a molten Al alloy which is an inevitable impurity. First heat treatment of the wire rod at 50 ° C. or more and less than 300 ° C. for 1 to 30 hours;
Secondary heat treatment, and then the wire has a cross-sectional area reduction rate of 50%.
% Of heat-resistant conductive material characterized by being subjected to cold working of at least
1 Manufacturing method of alloy wire. 9. A wire is formed by using 0.10 to 0.50 wt% of Zr and 0.05 to 0.50 wt% of Sc, and the balance is formed of Al and a molten Al alloy which is an inevitable impurity. 100 ° C or higher and lower than 300 ° C x 1 to 100
Heat treatment for a time, then subject the wire to cold working with a cross-sectional area reduction rate of 50% or more, and then subject the cold-worked material to heat treatment at 300 to 500 ° C. for 1 to 100 hours. Of manufacturing a heat-resistant conductive aluminum alloy wire rod. 10. Zr is 0.10 to 0.50 wt%, Sc
Is formed by using Al alloy melt which is 0.05 to 0.50 wt% and the balance is Al and unavoidable impurities, and then the first heat treatment is performed on the wire at 50 ° C. or more and less than 300 ° C. for 1 to 30 hours. , 300-500 ° C x 10-60 hours 2
Secondary heat treatment, and then the wire has a cross-sectional area reduction rate of 50%.
% Of cold-worked material and then 3%
A method for producing a heat-resistant conductive aluminum alloy wire rod, which comprises performing a heat treatment at 00 to 500C for 1 to 100 hours. 11. The method according to claim 11, wherein the molten aluminum alloy further comprises Si,
The method for producing a heat-resistant conductive aluminum alloy wire according to any one of claims 7 to 10, further comprising at least one metal component of Fe, Ti, B, and Be. 12. The above Si, Fe, Ti, B, and Be
Content of Si: 0.05 to 0.10 wt%, Fe:
0.05 to 0.30 wt%, Ti: 0.01 to 0.10
wt%, B: 0.003 to 0.02 wt%, Be: 0.
The method for producing a heat-resistant Al alloy wire for electric conduction according to claim 11, wherein the amount is 005 to 0.05 wt%.